Can I not decide on additional Shurink treatments immediately after receiving one?

I was looking into Shurink because of my jawline
Looking at the reviews, I saw that some people were satisfied after receiving it once and got it again.

I want to check how effective it is before making a decision.
I'm worried because I've heard that you can't really tell right after the procedure. 🤔

After receiving it for the first time, wait for a while and see.
I'm wondering if it is common practice to determine whether additional procedures are necessary.